The equation shows the reaction of one mole of methane with two moles of oxygen: CH₄(g) + 2O₂(g) → CO₂(g) + 2H₂O(g). The bond energies are given in the table.

1. aCalculate the total energy needed to break all the bonds in the reactants. [2]
2. bCalculate the total energy needed to form all the bonds in the products. [2]
3. cCalculate the total energy change for the reaction. [2]
4. dState whether the reaction is exothermic or endothermic. [1]
5. eDescribe a labelled energy level diagram, including activation energy, for the reaction of methane and oxygen (draw it on paper). [4]

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